TABLE 2.
Immunohistochemical Staining
| Case No. | Case ID | CD31 | CD34 | ERG | EMA | CD99 | SMA | NKX2-2 | NKX3-1 | Aggrecan |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | L6829 | Weak | Mosaic† | Mosaic | − | Weak* | Mosaic | − | − | Mosaic |
| L6952 | + | Mosaic | + | − | +* | + | − | − | Focal | |
| L6947 | Focal | Mosaic | + | − | − | Focal strong | − | NP | NP | |
| 2 | L6959 | Mosaic | + | Weak | Focal | Focal | + | − | − | Mosaic |
| 3 | L6830 | − | − | − | − | + | + | − | − | + |
| 4 | L6831 | − | − | − | Focal | Focal weak | Focal | − | − | + |
| 5 | L6861 | − | − | − | + | + | + | − | − | Focal |
| 6 | L6863 | NP | NP | NP | NP | NP | NP | NP | NP | NP |
| 7 | L7186 | − | − | − | + | + | − | − | − | NP |
| 8 | L6837 | − | − | − | − | + | NP | NP | NP | Focal |
| 9 | L1857 | Focal weak | − | − | Focal weak | + | − | Focal weak | Focal weak | +‡ |
| 10 | L1231 | − | − | − | + | + | − | Focal weak | Focal weak | +‡ |
*
Lining cells and stromal cells.
†
Some larger cysts are entirely negative.
‡
Diffuse.
− indicates negative staining; +, positive staining; NP, not performed.